Question

Which of the following statements about biogeochemical cycles is not true?

a. Biogeochemical cycles include living and nonliving elements.
b. The rock cycle is a biogeochemical cycle.
c. Biogeochemical cycles are an important part of the Earth system.
d. Carbon, nitrogen, and oxygen cycles are biogeochemical cycles.

Answer 1

The rock cycle is not a biogeochemical cycle; this type of cycle refers to the recycling of inorganic matter between living organisms and the nonliving environment, with the rock cycle primarily involving geologic processes.

Step-by-step explanation:

The correct answer to the question regarding which statement about biogeochemical cycles is not true would be option b. The rock cycle is not considered a biogeochemical cycle because it primarily involves geologic, rather than biological processes. While biogeochemical cycles do include the nonliving elements, they specifically refer to the recycling of inorganic matter between living organisms and the nonliving environment. Microorganisms play a significant role in these cycles, interconverting oxidized and reduced forms of molecules.

Biogeochemical cycles are crucial parts of the Earth system, as they include both biotic and abiotic components. Examples of biogeochemical cycles are the water cycle, carbon cycle, and nitrogen cycle. These cycles are essential for the recycling of important elements such as carbon, nitrogen, and oxygen through ecosystems, continuously transferring these elements between living organisms and the environment.

Answer 2

The carbon cycle is definitely an example for a biogeochemical cycle - The nitrogen and oxygen cycles are biogeochemical cycles too! so the last statement is true.

The biogeochemical cycle includes also for example the movement of water which is nonliving, so a) is also true.
The false statement is b) since the rock cycle does not include any biomatter.